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1. 发明专利

JP2012216586A Method of molding anisotropic magnet 审中-公开
标题翻译：模拟非线性磁体的方法
公开(公告)号：JP2012216586A
公开(公告)日：2012-11-08
申请号：JP2011079304
申请日：2011-03-31
申请人： Tdk Corp , Tdk株式会社
发明人： NISHIZAWA KOICHI , NAKANO HIROBUMI
IPC分类号： H01F41/02
摘要： PROBLEM TO BE SOLVED: To provide a molding method in which an anisotropic magnet is produced with high production efficiency even when a mold having an opening of small size is used.SOLUTION: A method of molding an anisotropic magnet includes: a first step in which a mold is filled with a raw powder containing a magnetic powder and the raw powder is pressurized in a magnetic field to produce a compact; and a second step in which a magnetic field is applied to the compact and the mold to demagnetize them. When the width of an opening of the mold is x (mm), the residual magnetization of the mold in filling the raw powder in first step is β(G), strength of the magnetic field to be applied in the second step is γ(G) and a value calculated by formula: : X=γx/βis X, the formula X≥0.5 is satisfied.
摘要翻译：要解决的问题：即使使用具有小尺寸开口的模具，也提供一种即使以高生产率生产各向异性磁体的成型方法。＆lt; P＆gt;解决方案：一种成型各向异性磁体的方法包括：第一步骤，其中模具填充含有磁粉的原料粉末，并且将原料粉末在磁场中加压以产生成型体; 以及第二步骤，其中将磁场施加到压块和模具以使其退磁。当模具的开口宽度为x（mm）时，在第一步骤中填充原料粉末的模具的剩余磁化强度为β（G），第二步骤中施加的磁场强度为γ（ G）和由公式计算的值：X =γx/β 2 是X，满足公式X≥0.5。版权所有（C）2013，JPO＆INPIT

2. 发明专利

JP2007222874A Powder molding apparatus and powder molding method 有权
标题翻译：粉末成型设备和粉末成型方法
公开(公告)号：JP2007222874A
公开(公告)日：2007-09-06
申请号：JP2006043226
申请日：2006-02-21
申请人： Tdk Corp , Tdk株式会社
发明人： NISHIZAWA KOICHI , KUNIYOSHI YOICHI , SAKAMOTO KEITARO , TAKEBUCHI KATASHI , SAITO KIYOSHI
IPC分类号： B30B11/00 , B22F3/035 , B30B11/02 , C22C38/00 , H01F1/053 , H01F1/08 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To provide a powder molding apparatus where, when a flat molded body is press-molded using a liquid lubricant, the generation of clogging in a feed port for the lubricant formed at the lower punch can be suppressed. SOLUTION: The powder molding apparatus is equipped with: a die having a die hole piercing to a vertical direction; an upper punch and a lower punch 14 for applying pressurizing force to a powder composition fed into the die hole. A vertical feed path 31 is arranged almost at the central part of the cross-sectional face of the lower punch 14. The horizontal feed path 34 is composed of: a main feed path 34a parallel to the longitudinal direction of the cross-sectional face in the lower punch 14 and having an almost fixed opening diameter; and a plurality of sub-feed paths 34b branched from the main feed path 34a along the short-length direction of the cross-sectional face in the lower punch 14 from the main feed path 34a. The opening area of each sub-feed path 34b is not greater than the opening area of the main feed path 34a, and is also larger as its distance from the vertical feed path 31 is farther. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种粉末成型装置，其中当使用液体润滑剂压制成型扁平成形体时，可以抑制在下冲头形成的润滑剂的供给口中产生堵塞。解决方案：粉末成型设备配备有：具有穿过垂直方向的模孔的模具; 上冲头和下冲头14，用于向送入模孔的粉末组合物施加加压力。垂直进给路径31几乎位于下冲头14的横截面的中心部分。水平进给路径34包括：平行于横截面的纵向方向的主进给路径34a 下冲头14具有几乎固定的开口直径; 以及从主进给路径34a沿着主冲压头14的下冲头14的截面的短长方向分支的多个副进给路径34b。每个副供给路径34b的开口面积不大于主进给路径34a的开口面积，并且随着与垂直进给路径31的距离越远，也越大。版权所有（C）2007，JPO＆INPIT

3. 发明专利

JP2006299402A Raw material alloy for r-t-b system sintered magnet and r-t-b system sintered magnet and producing method therefor 有权
标题翻译：用于R-T-B系统烧结磁体和R-T-B系统烧结磁体的原材料合金及其制造方法
公开(公告)号：JP2006299402A
公开(公告)日：2006-11-02
申请号：JP2006020062
申请日：2006-01-30
申请人： Tdk Corp , Tdk株式会社
发明人： ENOKIDO YASUSHI , NISHIZAWA KOICHI , ISHIZAKA TSUTOMU
IPC分类号： C22C38/00 , B22F1/00 , B22F3/00 , B22F3/02 , C22C33/02 , H01F1/053 , H01F1/08 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To obtain an R-T-B system sintered magnet having the high coercive force by further uniforming the crystal micro-structure of a raw material alloy produced with a strip casting method and making fine of the crushed power and narrow of the size distribution obtained from the raw material alloy. SOLUTION: The raw material alloy for R-T-B system magnet has the crystal grains composed of R 2 T 14 B compound and contains 100-950 ppm P and/or S contents. This raw material alloy is desirable to have the compositions composed of 25-35 wt.% R, 0.5-4 wt.% B, 0.02-0.6 wt.% one or two kinds of Al and Cu, 0.5-4 wt.% Co and the balance Fe with inevitable impurities. Wherein, R is one or more kinds of elements selected from rare earth meal group and T is one or more kinds of elements selected from the transition metal group containing Fe or Fe and Co. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题为了通过进一步使用带状铸造法生产的原料合金的晶体微结构进一步均匀化，获得具有高矫顽力的RTB系烧结磁体，并使粉碎功率的细小和从原料合金获得的粒度分布。解决方案：用于RTB系统磁体的原料合金具有由R 2 14 B化合物组成的晶粒，并含有100-950ppm的P和/或S 内容。该原料合金是希望具有由25-35重量％的R，0.5-4重量％的B，0.02-0.6重量％的一种或两种Al和Cu组成的组合物，0.5-4重量％的Co 余量为Fe与不可避免的杂质。其中，R为选自稀土粉组中的一种或多种元素，T为选自含有Fe或Fe和Co的过渡金属组中的一种或多种元素。（C）2007，JPO＆INPIT

4. 发明专利

JP2006258616A Method of evaluating orientation degree, rare-earth sintered magnet and its manufacturing method 审中-公开
标题翻译：评估方位方法，稀土烧结磁体及其制造方法
公开(公告)号：JP2006258616A
公开(公告)日：2006-09-28
申请号：JP2005076732
申请日：2005-03-17
申请人： Tdk Corp , Tdk株式会社
发明人： SAKAMOTO TOKUJI , KATO EIJI , NISHIZAWA KOICHI , ISHIZAKA TSUTOMU
IPC分类号： G01N23/20 , B22F3/02 , H01F1/053 , H01F1/08 , H01F7/02 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To provide a method of evaluating an orientation degree capable of accurately evaluating the orientation degree in a macroscopic region, and to achieve a rare-earth sintered magnet whose whole orientation degree is high and which is excellent in magnetization characteristic or the like. SOLUTION: A molding obtained by compressively molding rare-earth alloy powder or its sintered compact is equally divided into odd number of pieces, and X-ray diffraction processes are applied on the divided pieces of the center section and the outermost section, and then orientation degrees of respective divided pieces are calculated by using a Lotgering method, thereby evaluating variations in the orientation degrees. When calculating them, vector compensation is applied on X-ray diffraction intensity of each diffraction peak. In the rare-earth sintered magnet, the difference of calculated orientation degree subjected to the vector compensation between the divided piece of the center section and the divided piece of the outermost section is 1.5% or less. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种评价能够准确地评价宏观取向度的取向度的方法，并且获得整个取向度高且磁化强度优异的稀土烧结磁体特征等。解决方案：将通过压缩成型稀土合金粉末或其烧结体获得的成型体等分成奇数，并将X射线衍射法施加到中心部分和最外部分的分割片上，然后通过使用浮法来计算各分割片的取向度，从而评价取向度的变化。当计算它们时，对每个衍射峰的X射线衍射强度施加矢量补偿。在稀土类烧结磁体中，中心部的分割片与最外侧的分割片之间的向量补偿的计算取向度的差为1.5％以下。版权所有（C）2006，JPO＆NCIPI

5. 发明专利

JP2006173585A Rare-earth sintered magnet 有权
标题翻译：稀土烧结磁铁
公开(公告)号：JP2006173585A
公开(公告)日：2006-06-29
申请号：JP2005332251
申请日：2005-11-17
申请人： Tdk Corp , Tdk株式会社
发明人： ENOKIDO YASUSHI , NISHIZAWA KOICHI , ISHIZAKA TSUTOMU
IPC分类号： H01F41/02 , H01F1/053
摘要： PROBLEM TO BE SOLVED: To provide a technology to improve a contact strength between a magnet body and a protective film. SOLUTION: The rare-earth sintered magnet is provided with a magnet body made of a sintered compact containing a rear earth element and a protective film formed on the surface of the magnet body, wherein the ratio between an average crystal grain diameter D50 of the magnet body and ten-point average roughness Rz of the magnet body with the protecting film formed thereon, Rz/D50, is prescribed to be 0.20 or more and 10.00 or less. Therefore, the contact strength of the protective film is made as high as 100 N/m or more, thereby providing a rare-earth sintered magnet having an excellent corrosion-resistance. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种提高磁体与保护膜之间的接触强度的技术。解决方案：稀土烧结磁体设置有由包含形成在磁体主体的表面上的后土元素和保护膜的烧结体制成的磁体，其中平均晶粒直径D50 和其上形成有保护膜的磁体Rz / D50的十点平均粗糙度Rz规定为0.20以上且10.00以下。因此，保护膜的接触强度高达100N / m以上，从而提供耐腐蚀性优异的稀土类烧结磁体。版权所有（C）2006，JPO＆NCIPI

6. 发明专利

JP2005206909A Compacting method in magnetic field, and method for producing rare earth sintered magnet 审中-公开
标题翻译：磁场中的压制方法以及生产稀土烧结磁体的方法
公开(公告)号：JP2005206909A
公开(公告)日：2005-08-04
申请号：JP2004016594
申请日：2004-01-26
申请人： Tdk Corp , Tdk株式会社
发明人： CHO TSUTOMU , NISHIZAWA KOICHI , HATAKEYAMA MASATOSHI , ISHIZAKA TSUTOMU
IPC分类号： B22F3/02 , C22C33/02 , H01F1/08
摘要： PROBLEM TO BE SOLVED: To provide a compacting method in a magnetic field capable of further improving orientation compared with the conventional one by using a pulse magnetic field, and to provide a method for producing a rare earth sintered magnet. SOLUTION: The compacting method in a magnetic field includes: a stage where magnetic powder is packed into a die; and a stage where a pulse magnetic field is applied to orientate the magnetic powder packed into the die. The pulse magnetic field is applied multiple times in the case, provided that H is defined as the magnetic field (T), the density ρof a green compact composed of the magnetic powder satisfies the condition of ρ=α×H 0.5 +β(α=0.63, and β=1 to 2). COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种通过使用脉冲磁场与现有技术相比能够进一步改善取向的磁场中的压实方法，并提供稀土烧结磁体的制造方法。解决方案：磁场中的压实方法包括：将磁粉填充到模具中的阶段; 并且施加脉冲磁场以使填充到模具中的磁粉定向的阶段。在这种情况下，脉冲磁场被施加多次，只要H定义为磁场（T），由磁粉组成的生坯的密度ρ满足ρ=α×H 0.5 < /SP>+β(α=0.63,β= 1〜2）。版权所有（C）2005，JPO＆NCIPI

7. 发明专利

JP2005159052A R-t-b-based permanent magnet and its manufacturing method 审中-公开
标题翻译：基于R-T-B的永久磁铁及其制造方法
公开(公告)号：JP2005159052A
公开(公告)日：2005-06-16
申请号：JP2003396326
申请日：2003-11-26
申请人： Tdk Corp , Tdk株式会社
发明人： ISHIZAKA TSUTOMU , NISHIZAWA KOICHI , HIDAKA TETSUYA
IPC分类号： B22F1/00 , B22F3/00 , C22C38/00 , H01F1/053 , H01F1/08 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To provide an R-T-B based permanent magnet at a low cost that has a comprehensively favorable magnetic characteristic by obtaining a high magnetism holding force and a squareness ratio by suppressing abnormal grain growth, in the R-T-B based permanent magnet reduced in an oxygen content for obtaining high remanent density. SOLUTION: The method of manufacturing the R-T-B-based permanent magnet includes a step of obtaining a molded body constituted of the mixed powder of first alloy powder composed mainly of an R 2 T 14 B compound, second alloy powder composed mainly of R and T and containing more R than the first alloy powder does, and M-oxide powder (wherein, M-oxide is one or two or more kinds of oxides selected from among a gallium oxide, a tin oxide, a silicon oxide, a vanadium oxide, a titanium oxide, and a bismuth oxide). The method also includes a sintering step of sintering the molded body. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了通过在抑制异常晶粒生长中获得高磁力保持力和矩形比来以低成本提供具有全面有利的磁特性的RTB永磁体，在RTB永磁体中减少用于获得高残留密度的氧气。解决方案：制造RTB型永磁体的方法包括以下步骤：获得由主要由R SB SB 14合成的第一合金粉末的混合粉末构成的成型体 B化合物，主要由R和T组成并且含有比第一合金粉末多的R的第二合金粉末和M氧化物粉末（其中，M氧化物是选自以下的一种或两种以上的氧化物：氧化镓，氧化锡，氧化硅，氧化钒，氧化钛，氧化铋等）。该方法还包括烧结成型体的烧结步骤。版权所有（C）2005，JPO＆NCIPI

8. 发明专利

JP2002329629A METHOD OF MANUFACTURING MAGNET 失效
公开(公告)号：JP2002329629A
公开(公告)日：2002-11-15
申请号：JP2001133665
申请日：2001-04-27
申请人： TDK CORP
发明人： UCHIYAMA RYOTA , YAMAMOTO TOMOMI , NISHIZAWA KOICHI
IPC分类号： B22F3/24 , B22F1/02 , C23C22/00 , C23C22/06 , C23C22/74 , C23D5/00 , H01F1/053 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To provide a method of manufacturing magnet by which a magnet having a protective coating film which is excellent in corrosion resistance and adhesion property and has no possibility of contaminating the circumference of the magnet can be manufactured inexpensively. SOLUTION: This method of manufacturing magnet includes the step of forming an alkaline silicate coating film on the surface of the main body of the magnet containing a rare-earth element and a step of treating the alkaline silicate coating film with an acidic aqueous solution containing at least one acid selected from among a boric acid, oxalic acid, and sulfurous acid.

9. 发明专利

JPH07201622A SINTERED MAGNET AND ITS PRODUCTION 失效
公开(公告)号：JPH07201622A
公开(公告)日：1995-08-04
申请号：JP35391693
申请日：1993-12-27
申请人： TDK CORP
发明人： FUKUNO AKIRA , NAKAMURA HIDEKI , NISHIZAWA KOICHI
IPC分类号： B22F3/00 , H01F1/053 , H01F1/057 , H01F1/08 , H01F41/02
摘要： PURPOSE:To provide an inexpensive thin magnet by suppressing fluctuation in the dimensions of an R-T-B based sintered magnet at the time of sintering thereby eliminating the need of grinding after sintering. CONSTITUTION:When a sintered magnet containing R (at least one kind of rare earth element containing Y), T (Fe and/or Co) and B, a molded item of magnetic powder having average particle size in the range of 70-350mum and density of 5.5g/cm or above is sintered such that the density varies by 0.2g/cm or more.

10. 发明专利

JP2009295638A Method for manufacturing r-t-b magnet 审中-公开
标题翻译：制造R-T-B磁铁的方法
公开(公告)号：JP2009295638A
公开(公告)日：2009-12-17
申请号：JP2008145068
申请日：2008-06-02
申请人： Tdk Corp , Tdk株式会社
发明人： KOGA TOSHIYUKI , NISHIZAWA KOICHI , FUKAZAWA ARITERU , ISHIZAKA TSUTOMU
IPC分类号： H01F41/02 , B22F3/00 , B22F3/10 , B22F3/24 , C22C38/00 , H01F1/053
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing an R-T-B magnet capable of suppressing fluctuation in a composition of a molded body in baking, improving magnetic characteristics of the obtained R-T-B magnet and preventing a variation in the magnetic characteristics accompanied by the fluctuation in the composition of the R-T-B magnet. SOLUTION: This method for manufacturing an R-T-B magnet comprises: a molding step of forming a molded body of a magnetic material, a temperature rise step of heating the molded body to raising the temperature of the molded body up to a baking temperature T s °C, and a temperature maintaining step of maintaining the temperature of the molded body at T s °C. In the temperature rise step or the temperature maintaining step, the atmosphere is switched from a vacuum atmosphere to an inert gas atmosphere, and switching from the vacuum atmosphere to the inert gas atmosphere is executed before a time point t 1 and after a time point t 2 , where t 1 is a time point when the temperature of the molded body reaches T s °C, and t 2 is a time point when the temperature of the molded body reaches T s °C and 50 minutes have not elapsed while maintaining the temperature at T s °C after t1. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种制造能够抑制烘焙中的成型体的组成变动的RTB磁体的方法，改善所获得的RTB磁体的磁特性，并防止伴随着 RTB磁体的组成波动。解决方案：这种制造RTB磁体的方法包括：形成磁性材料成型体的成型步骤，加热成型体以将成型体的温度升高到烘烤温度T的升温步骤＆lt; SB＆gt;℃，以及将成型体的温度保持在T SB>℃的温度保持步骤。在升温步骤或温度保持步骤中，将气氛从真空气氛切换到惰性气体气氛，并且在时间点t 1 并且在t 2 的时间点之后，其中t 1 是成型体的温度达到T ~~S ℃的时间点，并且t 2 是当成型体的温度达到T ~~S S时的时间点，并且在保持温度为T ~~S时没有经过50分钟， / SB>℃。版权所有（C）2010，JPO＆INPIT~~~~~~

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